Seat motors are supplied as individual units for each axis, so a listing covers the slide, the recline, the height or the tilt.
Failures show up as a seat that moves in one direction only, a folding mechanism that will not release, or a ventilated seat that runs but no longer blows. Before ordering a motor, check the switch and the module, because a failed switch produces exactly the same symptom and is far cheaper to replace.
Match the motor by axis, by side and by seat type, since a memory seat uses a different motor with a position sensor. Cables are matched by length and by end fitting. Where the seat has been replaced with a used assembly, confirm that the motor connector matches the vehicle harness.